If there is a way to do this typical task without using aliases, I'm all for it.

I want all requests at the /minesweeper/* URL to be pulled from a completely different directory than other requests. The following configuration WORKS, files are served, but the MIME-type is application/octet-stream instead of what it should be (i.e. text/css). With the incorrect MIME type, it is impossible for web browsers to render the CSS styles in the document.